What Is a Unix Timestamp Converter?
A Unix timestamp converter translates between Unix timestamps (the number of seconds since January 1, 1970 UTC) and human-readable date and time formats. Unix timestamps are the universal time representation used in operating systems, databases, log files, and programming APIs across virtually all platforms.
How to Use This Unix Timestamp Converter
- Enter a Unix timestamp (in seconds or milliseconds) to see the corresponding date and time in both UTC and your local timezone.
- Or select a date and time using the picker to generate the Unix timestamp value.
- Copy the converted value for use in your application code, database queries, or log analysis.
Key Concepts
Unix time (also known as POSIX time or epoch time) counts seconds continuously from the epoch (1970-01-01 00:00:00 UTC). It is timezone-independent, making it ideal for storing and comparing timestamps across distributed systems. The current Unix timestamp increases by one every second and never resets. Millisecond timestamps (13 digits) are common in JavaScript and Java, while second-based timestamps (10 digits) are standard in C and Python.
Frequently Asked Questions
What is the Unix epoch?
The Unix epoch is the reference point: January 1, 1970, at 00:00:00 UTC. All Unix timestamps measure the number of seconds elapsed since this moment. A timestamp of 0 represents exactly the epoch.
How do I get the current Unix timestamp in code?
In JavaScript, use Math.floor(Date.now() / 1000) for seconds or Date.now() for milliseconds. In Python, use int(time.time()). In Bash, use the command date +%s. Each returns the current seconds since epoch.
Can Unix timestamps be negative?
Yes. Negative Unix timestamps represent dates before the epoch (before January 1, 1970). For example, −86400 represents December 31, 1969. Most modern systems and programming languages handle negative timestamps correctly.